Windmill.



No. 888,837. PATENTED 13120.18, 190m J. F. AYERS.

WINDMILL.

APPLIGATION FILED JUNE 1, 1906.

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PATENTED 1336.18, 1906. I

J. F. AYERS, WINDMILL.

APPLICATION FILED JUNE 1, 1906.

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No. 832L837.

PATENTED DEG.18, 1906. J. F.- AYERS.

WINDMILL. APPLIGATION FILED JUNE 1, 1906.

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N0. 838,837. 1 PATENTED DEG. 18, 1906. J; P. AYERS.

WINDMILL.

APPLICATION FILED JUNE 1, 1906.

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v wind-wheel shaft.

TINTTFD STATES ATENT OFFICE.

WINDMILL.

Specification of Letters Patent.

Patented Dec. 18, 1906.

Application filed June 1, 1906. Serial No. 319,784.

To rtZZ whmn it may concern.-

Be it known that I, J AOOB F. AYERS, residing at Kalka-ska, in thecounty of Kalkaska and State of Michigan, have invented certain new anduseful Improvements in WVindmills, of which the following is aspecification.

My invention relates to certain new and useful improvements inwindmills, and it particularly seeks to provide a windmill in whichmeans are provided for automatically feathering the vanes of thewind-wheel so that the windmill will be automatically controlled by thevelocity of the wind.

My invention has for its object to provide a mill of this character of avery simple and effective construction which can be easily and cheaplymanufactured and which will readily and effectively serve its intendedpur poses.

Generically, the invention includes an improved construction ofturn-table, an improved construction of wind-wheel, and an improvedmechanism for manually opening and closing the wind-wheel vanes, andmeans for mounting the wind-wheel vanes to be automatically closable bythe wind-pressure as the same increases above the normal amount.

My invention also includes an improved bearing for the wind-wheel shaftand a power attachment capable of being mounted and operativelyconnected with the wind-wheel shaft.

lVith other objects in view than have here tofore been specified, theinvention also includes certain novel construction, operation, andarrangement of parts, all of which will be first described in detail andthen be specifically pointed out in the appended claims, ref erencebeing had to the accompanying drawings, in which Figure 1 is aperspective view of my inven tion as applied for use. Fig. 2 is a sideelevation thereof. Fig. 3 is a top plan view thereof. Fig. 4 is acentral vertical longitudinal section on the line 4 4 of Fig. 3. Fig. 5is a detail perspective view of one of the windwheel vanes or blades.Fig. 6 is a horizontal section of the turn-table on the line 6 6 of Fig.4. Fig. 7 is an enlarged longitudinal section of the bearing end of thewind-wheel shaft, together with its bearing in the supportingstandard.Fig. 8 is a cross-section on the line 8 S of Fig. 7. Fig. 9 is a detailperspective of the shaft-sleeve detached from the Fig. 10 is across-section Fig. 11 is thereof on the line 10 10 of Fig. 9.

'of the drawings.

a similar view on the line 11 11 of Fig. 9. Fig. 12 is a verticallongitudinal section of the sleeve. Fig. 13 is an inverted perspectiveof one of the blades. Fig. 14 is a detail view of the power-mechanismattachment.

Referring now to the accompanying drawings, in which like characters ofreference indicate like parts in the figures, 1 l designate 'thetower-posts, which are suitably braced,

as at 1 by cross-braces, as shown in Fig. 1 At the up er end of thetower I secure a platform 2, orming part of the turn-table of the mill.At suitable intervals along the periphery of the platform 2 areradially-disposed arms 3, provided with bearing portions to receive thespindles 4" of the horizontally-held friction wheels or rollers 4, whichbear against the peripheral rim 7 of the upper or movable turn-tableportion 7, hereinafter referred to. tween the bearing brackets or arms 3are friction-rollers 5, mounted on spindles 5 arranged in'a plane atright angles to the direction of the spindle 4 of the friction-rollers4, so that the friction-rollers 5 will rotate at right angles to thefriction-rollers 41 and will bear against the under side of the upperband portion 7 of the movable turn-table member 7, before referred to,and to prevent the member 7 from jumping off the platform 2 I providethe rim 7 a with an inward-projectingflange 7, that is held under thefrictionrollers 5, but out of normal engagement therewith. The bearingmembers 7, to which the spindles 5 4 are respectively journaled, aresuitably braced to the platform 2 in any approved manner. The platform 7is provided with a central aperture 7 d to permit passage of thepump-rod 6 and an elongated slot 7 to permit passage of the powermechanism hereinafter again referred to.

Extending upwardly from the turn-table member 7 at diametricallyopposite points is a pair of vertically-disposed upright or columnmembers 8 9, which are braced by the bracket members 8 9 to theturntable member 7, and each upright or support 8.

Disposed be- 1 Each bearing-plate 10 has a spindle 10 for a purposepresently explained. One of the plates 10 is also provided with a pairof upwardly-projecting arms 10 terminating in bearings 10 to receive theoscillatable shaft 13, which carries a pair of levers 14, terminating insockets 14 for a purpose presently eX- plained. An arm 15 is alsosecured to the shaft 13, and the arm 1.5 carries a counterbalancedweight 15 for a purpose presently understood.

Each support 8 and 9 is formed with a projecting bearing-hub member 16,provided with an enlarged aperture 16 adapted to receive abearing-sleeve 17, which is keyed to the hub 16 by screw-keys 17 a 17 asshown in Figs. 7 and 8, and the sleeves 17 cooperate with similarbearing-sleeves 18 on the mandrel or wind-wheel shaft 20, which sleeve18 is keyed to the mandrel or shaft 20 by screwkeys 1'8, similarly tothe keys 17 for the sleeves 17. Arranged at suitable intervals on thesleeve 18 are collars 19, which are secured to the sleeves 18 andmandrel 20 by screw-bolts 21 passing therethrough. Between the collars19 andthe sleeves 17 and 18 I provide roller-bearings 22 to reduce thefriction. WVithin the hub portion 16 are oilchannels 16*, communicatingwith spaces between the collars 19 to oil the frictionrollers 22, and toprevent dust from entering the bearings I close the end of the hub 16 bya cap 23, as shown.

Adjacent each support 8 and 9 on the wind-wheel shaft 20 aredriving-pinions 24, which mesh with the pinions 25, mounted on thestub-shafts 10 and provided with anti friction-bearings 25, asindicated, and each pinion 25 is provided with a crank 25 which iscooperatively connected with the pitmen 26, that connect with thetransverse bar 27, mounted between the guide-posts 28 for movement in avertical plane, and to which bar 27 the pump-rod 6 is secured. Rigidlysecured to the support 8 is a tailvane 82, by means of which undercontrol of the wind the turn-table member is revolved to bring thewind-wheel into operative relation to the wind.

Mounted on the wind-wheel shaft 20, which where it does not reside inthe bearings of the posts 8 and 9 is square in cross-section, is ashifting sleeve 29, provided with hubs 29, spaced apart and having theiradjacent faces formed with ball-races 29 to receive the bearing-balls30, which cooperate with the side faces of the yoke member 31, mountedon the eccentric disk 32, that is carried by the wind-wheel 'aXle 20,and between the disk 32 and the yoke member 31 I provide ball-bearings33, as shown. The eccentric disk 32 and the member 31, together with itsconnections with the arm 15 and weight 15, serve as a regulator for thewindmill-blades, as they open and close simiis provided withlaterally-extending arms 31 which connect, through the connectingrods34, with the rods 14, hereinbefore referred to, the rods 34 having aball to enter the socket 14' of the rods 14 and form a balland-socketconnection therewith. The hub 29 is of greater diameter than thegreatest diameter of the shaft 20 and. is provided with slotted portions29", covered with a housing 35, in which is pivotally mountedfrictionrollers 35', that ride on the shaft 20 and permit free movementof the sleeve 29 along the shaft. At one end the sleeve 29 is providedwith a disk 29*, that has radial apertures 27 at suitable intervalsapart, to which disk 29 the wind-wheel-controlling rods 36 connect.

' 'Ihe wind-wheel W comprises a central disk or hub 37, secured to theshaft 20 in any approved manner, from which a series of radial arms 37project, and at their ends the arms 37'" are joined by a rim 38, towhich at suitable intervals a U-shaped bearing-bolt 39 is secured, andupon the U-shaped bearing-arms 39 are the bearing members 40, secured tothe back of the wind-wheel blades or vanes 40, so that the blades 40will be capable of pivotal movement on the arms 39. Near the lower endthe blades 40 are provided with bearing members 41, to which one end ofthe rods 36 is pivotally connected. Each blade 40 is of the form shownin detail in Figs. 5 and 13 and is provided on its front face with aplurality of baffle members 41, arranged to receive the wind which actsupon the same in conjunction with the body portion of the blades 40 andturns the wheel.

42 designates a supplemental collar secured to the shaft 20, which isconnected with the rim 38 of the wind-wheel VV, which has stay-rods 43to firmly hold the windwheel to the shaft 20.

44 designates a lever secured to the shaft 13, by means of which theshaft 13 is oscil lated or rocked to cause the arms 14 to act upon thearms 34 and draw the sleeve 29 toward the post 8, and thus pull theblades in the wind-wheel 40 from a position in substantially a verticalplane to a horizontal position, as indicated in dotted lines in Fig. 4.Connected with the free end of the lever 44, which passes along the sideof the post 45, secured to the upper platform 7 that forms a part of theturn-table member 7, is a rod or wire 46, that passes down through asuitable aperture in the platform 7 and is under manual control.

Pivotally mounted on the support 45 is a latch member 47, thatcooperates with the end of the lever 44 to hold it down when it is notin its wheel-closing position, and the latch member 47 is automaticallyreleased through the medium of a lever 48, pivotally secured to the post45 and connected with the latch 47 by a link 49. The lever 48 iscontrolled through a rod or wire 50, that passes through a suitableaperture in the turn-table platform 7* and is manually operable.

51 designates a member secured to the post 8 at one end, which member 51is provided with a trackway 51 to receive a roller 52, whose spindle 52is connected with the arms 51 of the yoke 31 on the sleeve 29 by stays52 as indicated.

In operation the position of the various parts is that shown inFig. 1.The wind acting upon the wind-wheel turns the shaft 20, and through themedium of the gears 24 and 25 and the pitmen 26, as well as the bar 27,the motion of the shaft 20 is converted into a reciprocating motion thatis transmitted to the pump-rod 6. As the velocity ofthe wind increasesabove the maximum the wind-wheel blades will turn upon their pivotstoward the position shown in full lines in Fig. 2, (their closed orinoperative position,) and thus the speed of the mill will beautomatically controlled by the velocity of' the wind and will alwaysremain practically a constant. The action of the wind and the weight ofthe various parts of the wind-wheel is counterbalanced to apredetermined degree by the weight 15". The weight 15 and its operativeconnections with the wind-wheel shaft, including the cam-disk 32, 850.,form a governing mechanism for controlling or damping the action of thewindmilhblades in opening and closing. Of course the movement of the arm15 will be slight, as only a slight damping effect is desirable, andwhile it is true that the effect of the vibrations on the clutchmovement would alternate a retarding effect with an accelerating effect,yet the accelerating effect which is had as the weight 15 drops has atendency to pull the carriage 29 from right to left in Fig. 4, and henceexert a force tending to open the blades of the windmill farther. Thisaccelerating force while only slightly greater than the force exerted onthe carriage 29 when the weight is moved upwardly thus becomes itself aretarding action in holding the blades open against the wind-pressure.In other words, the oscillation of the weight 15 due to the action ofthe cam on the carriage 29 has a tendency as the weight 15 dropsslightly during the oscilla tion to pull the carriage 29 toward theweight, and hence exert a tension on the rods 36, which in operationtends to hold the windmill open. The weight as it is pulled up by thecam action will exert little or no effect toward moving the carriage 29in an opposite direction, since the movement which would tend to movethe carriage from left to right in Fig. 4 is taken up by the verticalmovement of the eccentric or cam disk. The member 51 serves to preventthe yoke 31 from rotating with the sleeve 29, which sleeve 29 rotateswith the shaft 20.

In lieu of the bar 27 or in conjunction therewith, if desired, I mayprovide a rotatable shaft 55, mounted in bearings 56 and provided withan intermediate crank 57 and with end cranks 58, as shown in Fig. 14.The end cranks 58 connect with the pitmen 26, while the middle crank 57connects, through the medium of the bearing-clamp 59, with the rod 60 asa ball-and-socket 00131160- tion with the powerrod 60, which may beconnected at its other end With the crank 61 on a band-wheel 62, fromwhich power can be taken off.

From the foregoing description, taken in connection with theaccompanying drawings, it is thought the complete construction,operation, and numerous advantages of my invention will be readilyunderstood by those skilled in the art to which the inventionappertains, and by reason of the turn-table being made of largediameterthe strains on the working parts thereof, as well as on thetower, will be reduced to a minimum, and by making the wheel W withautomatic controlling means operable by the wind-pressure the speed ofthe mill can be maintained practically constant, and the danger ofhaving the parts blown away when used in districts susceptible of severewind-storms is reduced to the minimum.

NVhat I claim is 1. The combination with a supportingtower, of aturn-table mounted thereon, supporting-posts carried by said turntableand having bearings, a wind-wheel shaftmounted in said bearings, awind-Wheel mounted on said shaft, said wind-wheel comprising a hub and arim portion, and blades pivotally connected with said rim portion, andmovable from a plane substantially parallel with the hub and rim portionof the wheel into planes at substantially right angles thereto,ashifting sleeve mounted on said shaft and cooperatively connected withsaid wheelblades, a rock-shaft mounted in bearings on one of saidsupports, levers connecting said rock-shaft with said sleeve, anoperatinglever connected with. said rock-shaft and a weighted lever alsoconnected with said rockshaft, means connected to said operatingleverand projecting downwardly through the turn-table for manuallycontrolling the operating-lever, latch devices mounted on the turn-tahlefor holding the operating-lever in one position, manually-controlledmeans for releasing said latch, a pumprod, means for transmitting themotion of the windwheel shaft to the pumprod, a member provided with. atrackway and secured to one of said posts, a bearing-roller operable insaid trackway and cooperatively connected with said shifting sleeve onthe wheel-shaft, substantially as shown and described.

2. The combination with a wind-wheel shaft and a wind-Wheel mountedthereon,

comprising a hub and. a rim portion, a supplemental hub mounted on thewind-wheel shaft and stay-rods connecting the supplemental hub with therim of the wind-wheel, bracket members secured to the wind-wheel rim,blades pivotally mounted on said bracket members for movement 011 anaxis transverse to the longitudinal axis of the blades, of a shiftablesleeve mounted on the wind-wheel shaft and cooperatively connected withthe wind-wheel blades, said sleeve having apertures, roller-bearingsproj ecting through said apertures and engaging said shaft, said sleevehaving annular portions, a yoke member mounted between said annularportions on said sleeve, ball-bearings for said yoke member and meanscooperatively connected with said yoke member for manually shifting thesleeve substantially as shown and described.

3. The combination with a wind-wheel shaft and a wind-wheef mounted.thereon, comprising a hub and a rim portion, a supplemental hub mountedon the wind-wheel shaft and stay-rods connecting thesupplemental hubwith the rim of the wind-wheel, bracket members secured to thewind-wheel rim, blades pivotally mounted on said bracket members formovement on an axis transverse to the longitudinal axis of the blades,of a shiftable sleeve mounted on the windwheel shaft and cooperativelyconnected with the wind-wheel blades, said sleeve having apertures,rollcr-bearings projecting said yoke member, means cooperatively con-inected with said yoke member for manually shifting the sleeve, saidlast-named means comprising a rock-shaft, arms "projecting from saidrock-shaft, connections between said armsand said yoke member, a leverconnected with said rock-shaft, and a rod or wire connected. with saidlever and adapted to be grasped by the operator.

4. The combination with a wind-wheel shaft and a wind-wheel mountedthereon, comprising a hub and a rim portion, a supplemental hub mountedon the wind-wheel shaft and stay-rodsconnecting the supplemental hubwith-the rim of the wind-wheel, bracket members secured to thewind-wheel rim, blades pivotally mounted on said bracket members formovement on an axis transverse to the longitudinal axis of the blades,of a shiftable sleeve mounted on the wind-wheel shaft and cooperativelyconnected with the wind-wheel blades, said sleeve having apertures,roller-bearings projecting through said apertures and engaging saidshaft, said sleeve having annular por tions, a yoke member mounted.between said annular portions on said sleeve, ball-bearings for saidyoke member, means cooperatively connected with said yoke member formanually shifting the sleeve, said last-named means comprising arock-shaft, arms projecting from said rock-shaft, connections betweensaid arms and said yoke member, a lever connected with said rock-shaft,a rod or wire connected with said lever and adapted to be grasped by theoperator, and means for locking said last-named lever, in one position,substantially as shown and described.

5. The combination with a wind-Wheel shaft and a windwheel mountedthereon, comprising a hub and a rim portion, a supplemental hub mountedon the wind-wheel shaft and stay-rods connecting the supplemental hubwith the rim of the wind-wheel,

bracket members secured to the wind-wheel rim, blades pivotally mountedon said bracket members for movement on an axis transverse to thelongitudinal axis of the blades, of a shiftable sleeve mounted on thewind-wheel shaft and cooperatively connected with the wind-wheel blades,said sleeve having apertures, roller-bearings projecting through saidapertures and engaging said shaft, said sleeve having annular portions,a yoke member mounted between said annular portions on said sleeve,ball-bearings for said yoke member, means cooperatively connected withsaid yoke member for manually shifting the sleeve, said last-named meanscomprising a rock-shaft, arms projecting from said rock-shaft,connections between said arms and said yoke member, a lever connectedwith said rockshaft, a rod or wire connected with said lever and adaptedto be grasped by the operator, and means for locking said last-namedlever, and manually-controlled means for releasing said 10 cking me ans,substantially as shown and described.

6. The combination With a wind-Wheel shaft and a wind-wheel mountedthereon, comprising a hub and a rim portion, a supplemental'hub mountedon the wind-wheel shaft and stay-rods connecting the supple mental hubwith the rim of the wind-wheel,,

.ed with said yoke memberfor manually IICI shifting the sleeve andcounterbalancing means for normally holding the sleeve in one positionon the shaft, substantially as shown and described.

7. The combination with a wind-wheel shaft and a wind-wheel mountedthereon comprising a hub and a rim portion, a supplemental hub mountedon the windwheel shaft and stay-rods com1ecting said supplemental hubwith the rim of the wind-wheel, bracket members secured to thewind-wheel rim, blades pivotally mounted on said bracket members formovement on an axis transverse to the longitudinal axis of the blades,of a shiftable sleeve mounted 011 the windwheel shaft and cooperativelyconnected with the wind-wheel blades, said sleeve having apertures,roller-bearings projecting through said apertures and engaging saidshaft, said sleeve having annular portions, a yoke member mountedbetween said annular portions on said sleeve, ball-bearings for saidyoke member, means cooperatively connected with said yoke member formanually shifting the sleeve, said last-named means comprising arock-shaft, arms projecting from said rock-shaft, connections betweensaid arms and said yoke member, a lever connected with said rock-shaft,and a rod or wire connected with said lever and adapted to be grasped bythe operator and counterbalancing means for normally holding the sleevein one position on the shaft, substantially as shown and described.

8. The combination with a wind-wheel shaft and a wind-wheel mountedthereon comprising a hub and a rim portion, a supplemental hub mountedon the wind-wheel shaft and stay-rods connecting the supplemental hubwith the rim of the windwheel, bracket members secured to the Wind-wheelrim, blades pivotally mounted on said bracket members for movement on anaxis transverse to the longitudinal axis of the blades, of a shiftablesleeve mounted on the wind-wheel shaft and cooperatively connected withthe Wind-Wheel blades, said sleeve having apertures, roller-bearingsprojecting through said apertures and engaging said shaft, said sleevehaving annular portions, a yoke member mounted between said annularportions on said sleeve, ball-bearings for said yoke member, meanscooperatively connected with said yoke member for manually shifting thesleeve, said last-named means comprising a rock-shaft, arms projectingfrom said rock-shaft, connections between said arms and said yokemember, a lever connected with said rock-shaft, a rod or wire connectedwith said lever and adapted to be grasped by the operator,counterbalancing means for normally holding the sleeve in one positionon the shaft, said counterbalancing means comprising a rod secured tosaid rockshaft and a weight adjustably held on said rock-shaft,substantially as shown and described.

9. The combination with a wind-wheel shaft and a Wind-wheel mountedthereon comprising a hub and a rim portion, a sup plemental hub mountedon the wind-wheel shaft, and stay-rods connecting the supplemental hubwith the rim of the wind-Wheel, bracket members secured to thewind-wheel rim, blades pivotally mounted on said bracket members formovement on an axis transverse to the longitudinal axis of the blades,of a shiftable sleeve mounted on the windwheel shaft and cooperativelyconnected with the Wind-wheel blades, said sleeve having apertures,roller-bearings projecting through said apertures and engaging saidshaft, said sleeve having annular portions, a yoke member mountedbetween said annular portions on said sleeve, ball-bearings for saidyoke member, means cooperatively connected with said yoke member formanually shifting the sleeve, a pump-rod, means cooperatively connectingthe pumprod with the wind-wheel shaft whereby the movement of thewindwheel shaft is transmitted to the pump-rod substantially as shownand described.

10. The combination with a windwheel shaft and a wind-wheel mountedthereon comprising a hub and a rim portion, a supplemental hub mountedon the wind-wheel shaft and stay-rods connecting the supplemental hubwith the rim of the wind-Wheel, bracket members secured to thewind-wheel rim, blades pivotally mounted on said bracket members formovement on an axis transverse to the longitudinal axis of the blades,of a shiftable sleeve mounted on the windwheel shaft and cooperativelyconnected with the wind-Wheel blades, said sleeve having apertures,roller-bearings proj ecting through said apertures and engaging saidshaft, said sleeve having annular portions, a yoke member mountedbetween said annular portions on said sleeve, ball-bearings for saidyoke member, means cooperatively connected with said yoke member forman'- ually shifting the sleeve, said last-named means comprising arock-shaft, arms projecting from said rock-shaft, connections betweensaid arms and said yoke member, a lever connected with said rock-shaft,a rod or wire connected with said lever and adapted to be grasped by theoperator, counterbalancing means for normally holding the sleeve in oneposition on the shaft, a pump-rod, means cooperatively connecting thepumprod with the wind-wheel shaft whereby the movement of the Wind-wheelshaft is transmitted to the pump-rod, substantially as shown anddescribed.

11. The combination with a windwheel shaft and a Wind-wheel mountedthereon comprising a hub and a rim portion, a supplemental hub mountedon the wind-wheel shaft and stay-rods connecting the supplemental hubwith the rim of the wind-wheel,

bracketmembers secured to the wind-wheel rim, blades pivotally mountedon said bracket members for movement on an axis transverse to thelongitudinal axis of the blades, of a shiftable sleeve mounted on thewind-wheel shaft and cooperatively connected with the wind-wheel blades,said sleeve having apertures, roller-bearings proj ecting through saidapertures and engaging said shaft, said sleeve having annular portions,a yoke member mounted between said annular portions on said sleeve,ball-bearings for said yoke member, means cooperatively connected withsaid yoke member for manually shifting the sleeve, said last-named meanscomprising a rock-shaft, arms project ing from said rock-shaft,connections be tween said arms and said yoke member, a lever connectedwith said rock-shaft, a rod or wire connected with said lever andadapted to be grasped by the operator, counterbalancing means fornormally holding the sleeve in one position on the shaft, saidcounterbalancing means comprising a rod secured to said rock-shaft and aweight adjustably held on said rock-shaft, a pump-rod, meanscooperatively connecting the pump-rod with the wind-wheel shaft wherebythe movement of the wind-wheel shaft is transmitted to the pump-rod,substantially as shown and described.

12. In a windmill, the combination. with a tower, aturn-table mountedthereon, upright supports secured to said turn-table and having bearingportions, a wind-wheel shaft mounted in said bearing portions, saidbearing portions and said wind-wheel shaft having cooperatingantifriction-bearings, antifrictionbearings for said turn-table, atail-vane secured to oneof said upright supports, a rockshaft carried byone of said upright supports, a shaft-sleeve on said wind-wheel shaft,rollerbearings for said shifting sleeve, a yoke member cooperating withsaid shifting sleeve, connections between said rock-shaft and said yokemember for transmitting the motion of the rock-shaft to the sleeve,counterbalancing means cooperatively connected with the rock-shaft, anoperating-lever connected with the rock-shaft, means for operating said.operating-lever from below the turntab1e, a Wind-wheel mounted on saidwindwheel shaft, said wind-wheel comprising hub and rim portions andpivotally-mounted vanes, means cooperatively connecting said vanes withsaid sleeve, pinions mounted on said upright supports,antifriction-bearings for said pinions, pinions carried by saidwindwheel shaft for meshing with said first-mentioned pinions, saidfirst-mentioned pinions having cranks, pitmen connected with saidcranks, a power-rod, means cooperatively connecting said pitmen withsaid power-rod, substantially as shown and described.

13. In a windmill, the combination with a tower, a turn-table, mountedthereon, upright supports secured to said turn-table and having bearingportions, a wind-wheel shaft mounted in said bearing portions, saidbear- 7 ing portions and said wind-wheel shaft having cooperatingantifriction-bearings, antifriction-bearings for said turn-table, atailvane secured to one of said upright supports, a rock-shaft carriedby one of said upright supports, a shifting sleeve on said windwheelshaft, roller-bearings for said shifting sleeve, a yoke membercooperating with said shifting sleeve, connections between saidrock-shaft and said yoke member for transmitting the motion of therock-shaft to the sleeve, counterbalancing means cooperativelyconnectedwith the rock-shaft, an operating-lever connected with the rock-shaft,means for operating said operating-lever from below the turn-table, awind-wheel mounted on said wind-wheel shaft, saidwindwheel comprisinghub and rim portions and pivotally-mounted vanes, means cooperativelyconnecting said vanes with said sleeve, pinions mounted on said uprightsupports, antifriction-bearings for said pinions, pinions carried bysaid wind-wheel shaft for meshing with said firstmentioned pinions, saidfirstmentioned. pinions having cranks, pitmen connected with saidcranks, a power-rod, means cooperatively connecting said pitmen withsaid power-rod a pivot member connected with one of said uprightsupports, a guide-roller carried by said yoke member for cooperatingwith said pivot member, substantially as shown and described.

14. In a windmill, the combination with a tower, a turn-table mountedthereon, upright supports secured to said turn-table and having bearingportions, a wind-wheel shaft mounted in said bearing portions, saidbearing portions and said wind-wheel shaft having cooperatingantifriction-bearings, antifriction bearings for said turn-table, atailvane secured to one of said upright supports, a rock-shaft carriedby one of said upright supports, a shifting sleeve on said windwheelshaft, roller-bearings for said shifting sleeve, a yoke membercooperating with said shifting sleeve, connections between saidrock-shaft and said yoke member for trans mitting the motion of therock-shaft to the sleeve, counterbalancing means cooperatively connectedwith the rock-shaft, an operating-lever connected with. the rock-shaft,means for operating said. operating-lever from below the turn-tab1e, awind-wheel mounted on said wind-wheel shaft, said windwheel comprisinghub and rim portions and pivotally-mounted vanes, means cooperativelyconnecting said vanes with said sleeve, pinions mounted on saiduprightsupports, an-

tifi'iction-bearingsforsaidpini0ns,pinions car- I cooperating with saidpivot member, and 10 ried by said wind-wheel shaft for meshing means forlocking the operating-lever of the \fith said first-mentioned pinions,said firstrock-shaft at times, and manually-controlled mentioned pinionshaving" cranks, pitmen means for releasing said locking means, sub- 5connected with said cranks, a power-rod, i stantially as shown anddescribed.

means cooperatively connecting said pitmen JACOB F. AYERS.

with said power-rod, a pivot member coni/Vitnesses: nected with one ofsaid upright supports, a Mrs. L. E. DAVIS, guide-roller carried by saidyoke member for ALIOE BLODGETT.

